@JA
It has a rowan mod.
I happen to have been down this road before back in april, where I tried to use a time lapse mode on my phone to look for issues filming the gears.
https://www.youtube.com/watch?v=MLZM-2pWufk
I think that was like 20 mins of realtime but cant remember.
I think I need to try doing this with the mount loaded up, maybe for a few more hours. I think I came to the conclusion that the errors are too small to see anything going wrong, even timing rotations.
Will absolutley double check the grub screws on the motor drive shafts are tight. But I did try (months ago) swapping the ra and dec motors without any benefit seems unlikely boath would have been slipping but who knows.
Thanks for all the advice so far BTW..
Mike.